Android system: Samsung Trend Plus Mobile phone with newest updates etc.
Webpage filtering does not work in Norton Family. Try block totally pages youtube.com and areena.yle.fi. Also test with some general homepages. No effect.
Browser in mobile phone: Internal Chrome (updated), Internal internet browser "internet". No effect.
So: Norton Family cannot block any web page.
Continue-tests: I test install Opera browser, no effect. Same problem.
Next: I try also F-secure (mobile) safe. It have also child-lock preference and it can block solutions. I click away "Chrome": Chrome still work. Then I test block solution named "Youtube", it is installed youtube player: Now F-secure mobile safe say "blocked, you cannot start up this solution". Sympton: So F-secure child lock can block solutions, but Chrome is protected.
It looks that "Norton Family cannot block any webpage" reason is: Android internal problem. So, no any software can block it or it content.